Fusilli () are a variety of pasta from southern Italy, with a helical (corkscrew) or helicoidal shape, also known as rotini in the United States and Canada.
, the singular form of , means in Italian. Fusilli are traditionally made by wrapping pasta dough around a spindle, or in Italian. Fusilli are believed to be of Arab derivation, and are known as busiata in Sicily and busa in Sardinia, the two Italian regions where Muslim civilization first penetrated. Both busiata and busa come from the Arabic word (), meaning the thin reed around which the dough was traditionally wound to make the pasta.
There are multiple regional Italian varieties of fusilli, which can be either extruded or hand-formed, solid (helicoidal) or hollow (helical), and short or long.
The common extruded solid short helicoidal variety is known simply as fusilli. The long version is known as fusilli Sorrento. Larger versions are known as fusilloni and Colonne Pompei, for the short and long varieties, respectively.
An elongated version that has a double-braided appearance is known as fusilli Capri.
The common extruded hollow helical (corkscrew) variety is known as () and is produced in short () and long () forms.
Hand-formed versions of this are made by wrapping pasta dough around a spindle at varying sizes, and are named after their areas of origin (e.g. from Avellino, from Naples, and from Gragnano). In Campania, these are sometimes served with Genovese sauce or beans.
In the United States and Canada, extruded short helicoidal pasta is also commonly known as "rotini", which is frequently sold in both standard and tri-color varieties.